The mold (or mould, in the Queen’s English) has been the victim of a bad press. Mention the word and it conjures up an image of something rotting or in the process of decomposition. And yet, were it not for the mold that inspired the discovery of penicillin millions of lives would have been lost. If you love cheese, wines such as Auslese, Sauternes and Tokaji or the protein rich meat-like product called quorn, you can thank the mold for that, too. The mold is a network of thread-like filaments. Some molds are good, some are bad. Some of the undesirable types of mold grow in the indoor environment. Apart from being a potential health hazard, indoor mold is unsightly. You usually find them in damp sections of the building such as the attic or basement, or in the kitchen and bathroom. The mold is also likely to raise its unsightly presence in parts of the home that have been flooded or have poor ventilation.

Indoor mold is a health hazard

The indoor mold can cause health problems, especially with those suffering from asthma. A greenish-black, slimy variety known as Stachybotrys chartarum has earned the name “toxic mold” and grows on wet organic material rich in cellulose such as wood or paper (but not on concrete or tile). It may cause severe problems for humans as well as pets, and is one of the causes of “sick building syndrome”. This indoor mold can produce allergic reactions like watery eyes, headaches, frequent sneezing and coughing.

Indoor mold is an early warning device

The upside is that an indoor mold can serve as an early warning device. It tells you that an area of the home is not properly ventilated, has excess moisture and that the air quality is inferior. You can then take steps to reduce moisture in the area and remove materials that cause mold growth.

Cleaning up indoor mold

The mold is everywhere and can survive under all sorts of conditions, even in places like the refrigerator. Some molds are resistant to anti-fungal soap or highly-acidic solvents. Therefore, when cleaning up a mold-infested area, you should always wear proper protection like a respirator mask, rubber gloves and the right clothing.

The key to cleaning up an area with indoor mold is to solve the moisture problem. Dry up the excess moisture and remove all the materials that have been infested by the mold. Get rid of items like carpets and wallpaper that cannot be cleaned and dried. First spray the area with water to keep down the dust and debris while you are removing the items. The materials should then be sealed in a double-bag and the bag wiped clean to prevent the mold from spreading to other areas.

If the area with indoor mold cannot be removed, it should be cleaned with soap or detergent. After that, it helps to disinfect the area with a diluted bleach solution (care should be taken when using bleach. It is a hazard too). Do not sand or scrape the surfaces and avoid using a hammer to remove drywall that is mold-infested.

If the affected area is larger than 10 square feet, you may need to turn the job over to a professional mold remediator. You can find companies that specialize in restoring homes damaged by fire and water whose services include indoor mold remediation.

If you would like to receive more information regarding our laboratory services or our prices, please call us at 905-290-9101 (Ontario) or 604-435-6555 (British Columbia). You can also complete the form below and we shall get back to you within 2 business days.

The damp climate in British Columbia is ideal for mould growth. It is recommended that homeowners or property managers regularly check their buildings for mould growth or water damage in order to correct the problem before it gets out of hand. For people looking for homes to rent or buy, it’s important that you check for signs of mould before moving into a place and take every step possible to prevent mould in your home. Some of the activities that may lead to mould growth include cooking, washing clothes or showering without venting out the moisture. As for tenants, finding mould may not be reason enough to break a tenancy agreement and move out of a place early. Furthermore, your landlord may blame you for causing the mould problem if mould growth was due to your lifestyle.

How To Control mould Growth

Reduce Indoor Humidity By:

Venting showers and other moisture-generating sources to the outside.

Controlling humidity levels and dampness by using air conditioners and de-humidifiers.

Question: I love your blog and hope you can answer this mold question.

I worked at a beauty salon for 1 1/2 years. I started to have back to back urinary tract infections (Escherichia coli). I’ve had these infections a couple of times in my 40+ years on earth but nothing like I was experiencing this time around. It felt like someone lined my bladder with vicks vapor rub and added some pins. The antibiotics I was prescribed made the pain worse. A client of mine (she came every week and spent a long time under the dryer) was experiencing the same thing. About 2 weeks after the bladder pain started, I started having difficulty breathing (I was diagnosed with moderate lung obstruction) and I was placed on an inhaler. I then noticed a fungal rash on my arms I had to treat with Monistat (it cleared up in 6 days). My symptoms started in early June after a flood in the shop which I suspect could have caused mold growth. Dehumidifiers were bought in and ran all day for a couple of days. By August I had to leave because it was just too difficult to breath, take a flight of stairs etc. My urologist couldn’t find the cause of the pain and an internal view of my bladder found nothing. Can mold, yeast, and non-specific bacteria found in these reports cause bladder problems? The pain got significantly better a week after I left. The pain went away completely after about 2 months away from the salon.

The owner decided to have an air quality test for mold done because a girl that rented the room prior to me complained of breathing difficulties only when she was at work. I attached the mold report for you to look at.

Thanks!

Answer:Escherichia coli (E. coli in short) is a bacterium commonly found in the lower digestive tract of warm-blooded animals including humans. Most E. coli strains are harmless, but some strains, such as serotype O157:H7, can cause serious food poisoning. E. coli is also a common cause of urinary tract infections. Infection occurs when E. coli from the digestive tract find their way into the urethra and begin to multiply. The bacterium can move to the bladder and multiply there causing infection of the bladder. I have looked at the lab report that you had attached. The molds reported are unlikely to cause infection. A possible fungal infection of the bladder especially when one has been using antibiotics is Candida infection (candidiasis). Candida can infect other areas of the body including the mouth, throat, skin, scalp, genitals, fingers, nails, bronchi, lungs, and the gastrointestinal tract.

Question: Is there any government or industry standard as to what is deemed an acceptable indoor airborne mold spore levels in Ontario? The electrical inspector refuses to come on our property even though we have had several air test performed. The qualified tester says we have samples of mold but found them to be acceptable. I was hoping for some clarity on this matter.

Answer: Currently there is no government or industry standard as to what is deemed acceptable indoor airborne mold spore levels. However, it’s generally agreed that mold in indoor environments is a health hazard. However, the higher the airborne mold spore levels in a building the higher the health risk. In 2007 Health Canada published the Residential Indoor Air Quality Guidelines: Moulds.

This is what Health Canada’s Residential Indoor Air Quality Guidelines say about exposure limits:

Health Canada considers that mold growth in residential buildings may pose a health hazard.
Health risks depend on exposure and, for asthma symptoms, on allergic sensitization. However, the
large number of mold species and strains growing in buildings and the large inter-individual variability
in human response to mold exposure preclude the derivation of exposure limits. Therefore, Health Canada recommends:

to control humidity and diligently repair any water damage in residences to prevent mold growth; and

to clean thoroughly any visible or concealed mold growing in residential buildings.

These recommendations apply regardless of the mold species found to be growing in the building.

Further, in the absence of exposure limits, results from tests for the presence of fungi in air cannot be used to assess risks to the health of building occupants.

So currently there is no acceptable or unacceptable indoor airborne mold Spore levels in Ontario.

Question: Do you have the normal mold levels for various types of mold, i.e. Cladosporium cladosporioides? Thank you.

Answer: Currently there are no widely accepted normal airborne mold levels. Although no exposure standards have been established that relate health effects to specific airborne mold levels, there are concerns from public health agencies regarding exposure to mold. Much evidence exists indicating that indoor exposures to molds contribute to occupant respiratory disease and symptoms. Mold levels are used to give us an indication of whether the occupants are exposed to mold originating from indoor environment. According to the American Conference of Government Industrial Hygienists (ACGIH), indoor mold levels should be less than 1/3 of outdoors levels. If indoor levels are above this amount, action should be taken to identify the source or location of mold growth and remove it. It’s important to note that the outdoor levels of mold can vary quite a lot over the different seasons and even week to week and the same is reflected indoors.

In the literature, 3000 spores per cubic meter of air is quoted as the allergenic threshold for Cladosporium. More recently a figure of 4000 spores per cubic meter of air has been cited. For Alternaria, 100 spores per cubic meter of air is cited in the literature as the allergenic threshold.

It is normal to find mold spores in any indoor environment in the air and surfaces such as clothes, walls, and furniture. Most of the time mold spores found indoors during a mold inspection is from outside sources and do not pose a hazard. Regular housekeeping cleaning helps keep mold levels low. Cleaning small areas of visible mold, like the mold around your shower, is important to maintain sanitary conditions.

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The mold (or mould, in the Queen’s English) has been the victim of a bad press. Mention the word and it conjures up an image of something rotting or in the process of decomposition. And yet, were it not for the mold that inspired the discovery of penicillin millions of lives would have been lost. […]